LIGHTFAST and water-soluble...
, June 27, 2013
LIGHTFAST and water-soluble - great for drawing. Most fountain pen inks (except
the water-insoluble pigment ones like the Noodler's bulletproof ones, Sailor
Nano inks, and Platinum Carbon Black) fade quickly and/or shift color AND fade
in the light. This one doesn't, at least in my tests which are currently going
on 5 months in a sunny window vs. a control in a drawer. This has been
previouisly been noted for Diamine Gray by other people on the web, along with
J. Herbin Gris Nuage, which is a lovely ethereal light blue-gray which also
appears to be lightfast. In my own tests, Diamine Jet Black (but not over a
dozen other water-soluble blacks I have tested) is also lightfast - 4 months and
counting in my sunny window. All good additions to your drawing kit. (I have
other suggests for a few colored inks that are pretty lightfast and good for
drawing, but that doesn't go here.)
This ink behaves well in a fountain pen too. NOT good for signing checks - too
soluble - but WONDERFUL for drawing.